NGA Calculators

NATIONAL GEOSPATIAL-INTELLIGENCE AGENCY Calculators

https://msi.nga.mil/Calc Many of the same calcs as USPS below.

United States Power Squadron Navigation Tools (This link no longer works, access to the tools requires login. Have sent an email. Possibly remove next review.) Unfortunately the USPS organization has changed and this software is no longer openly available.

• Celestial Tools
• LHA Calculator
• NavChk
• Navigational Triangle Program, NAVTRA
• Plottool
• Pub 229 and Sight Checking Spreadsheets
• N09 Required Software
• N15 Required Software

NGA Nautical Calculators

Maritime Safety Calculators